TRV Capacitors - GIS

Indoor installation

Gas-insulated switchgear (GIS) circuit breakers for tough environments with extreme temperature variations, dust, pollution or confined space may use transient recovery voltage (TRV) capacitors. They decrease the oscillation frequency and the rate of rise of recovery voltage (RRRV) of TRV which occurs during initiation or interruption of current flow. TRV capacitors are thus installed to increase breaking power of the circuit breaker.

CONDIS® GIS capacitors have a sophisticated design—its electrical insulation is made by a vacuum impregnated epoxy resin tube with a smooth external surface. This design guarantees mechanical robustness and oil- and gas-tightness within a high pressurized environment in a large, specified temperature range. Our capacitors are partial-discharge-free and have a proven record of high performance and reliability with years of in-field operation.

High-voltage GIS capacitors can be used in various types of gas-insulated switchgears, and their design is therefore customer-specific. Independent of the application, the flanges, tubes, and field distribution will remain unchanged, as seen in the outline drawing below.
Maxwell CONDOR technology offers a high flexibility and will therefore allow for a large customization to meet specific circuit breaker mechanical and electrical needs.

In a recent addition to the GIS product range, "arctic" capacitors have been designed for applications in the most severe environmental conditions, supporting extreme temperatures down to -60 degrees Celsius.